Sofa



FIG. 1 is a top and front perspective view of a sofa showing my newdesign;

FIG. 2 is a top and side perspective view thereof from the left of FIG.1, the side opposite that shown in FIG. 2 being the mirror imagethereof;

FIG. 3 is a top and rear perspective view thereof; and,

FIG. 4 is a top perspective view thereof.

The ornamental design for a sofa, as shown and described.